--- title: "AIKO AIKO-G640-MCH72Dw vs DAH Solar DHN-78X16/DG-640W - Solar Panel Comparison | ComparePV" description: "Compare AIKO AIKO-G640-MCH72Dw vs DAH Solar DHN-78X16/DG-640W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/aiko-aiko-g640-mch72dw/dah-dhn-78x16-dg-640w" updated: 2026-09-11 --- # AIKO AIKO-G640-MCH72Dw vs DAH Solar DHN-78X16/DG-640W AIKO-G640-MCH72Dw leads on the differences that matter The largest is module efficiency: 0.80 pp more efficient. 7 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AIKO AIKO-G640-MCH72Dw](https://comparepv.com/panel/aiko-aiko-g640-mch72dw) | [DAH Solar DHN-78X16/DG-640W](https://comparepv.com/panel/dah-dhn-78x16-dg-640w) | | Manufacturer | AIKO | DAH Solar | | Power | 640 Wp | 640 Wp | | Efficiency | 23.70 % | 22.90 % | | Technology | Back Contact | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | AIKO-G640-MCH72Dw | DHN-78X16/DG-640W | Difference | | --- | --- | --- | --- | | Module efficiency | 23.70 % | 22.90 % | +0.80 pp for AIKO-G640-MCH72Dw | | Temperature coefficient | -0.260 %/°C | -0.290 %/°C | +0.030 %/°C for AIKO-G640-MCH72Dw | | Power density | 236.9 Wp/m² | 229.0 Wp/m² | +8.0 Wp/m² for AIKO-G640-MCH72Dw | | Module area | 2.701 m² | 2.795 m² | 0.094 m² apart | | Open-circuit voltage | 53.80 V | 56.40 V | 2.60 V apart | | Cell technology | Back Contact | TOPCon | Back Contact vs TOPCon | | Cell count | 144 | 156 | 12 cells apart | | Voltage at max power | 45.10 V | 47.60 V | 2.50 V apart | | Short-circuit current | 14.94 A | 14.32 A | 0.62 A apart | | Dimensions | 2382x1134x30 mm | 2465x1134x34 mm | 2382x1134x30 mm vs 2465x1134x34 mm | | Current at max power | 14.20 A | 13.45 A | 0.75 A apart | ## Every compared parameter | Parameter | AIKO-G640-MCH72Dw | DHN-78X16/DG-640W | | --- | --- | --- | | Rated power | 640 Wp | 640 Wp | | Module efficiency | 23.70 % | 22.90 % | | Power density | 236.9 Wp/m² | 229.0 Wp/m² | | Open-circuit voltage | 53.80 V | 56.40 V | | Voltage at max power | 45.10 V | 47.60 V | | Short-circuit current | 14.94 A | 14.32 A | | Current at max power | 14.20 A | 13.45 A | | Temperature coefficient | -0.260 %/°C | -0.290 %/°C | | Dimensions | 2382x1134x30 mm | 2465x1134x34 mm | | Module area | 2.701 m² | 2.795 m² | | Weight | 33.5 kg | 34.2 kg | | Weight per kWp | 52.3 kg/kWp | 53.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | - | | Cell technology | Back Contact | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 156 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year - **Cumulative output, AIKO-G640-MCH72Dw:** 21,473 kWh - **Cumulative output, DHN-78X16/DG-640W:** 21,473 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | AIKO-G640-MCH72Dw | DHN-78X16/DG-640W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 640 W | 100.0% of rated power | | Cool, bright day | 40 °C | 615 W | 612 W | 95.7% of rated power | | Typical summer roof | 55 °C | 590 W | 584 W | 91.3% of rated power | | Hot roof | 70 °C | 565 W | 556 W | 87.0% of rated power | ## Against the whole database | Measure | AIKO-G640-MCH72Dw | DHN-78X16/DG-640W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #517 | #2,359 | 14,005 | AIKO-G640-MCH72Dw leads by 1,842 places | | Power density | #521 | #2,389 | 14,005 | AIKO-G640-MCH72Dw leads by 1,868 places | | Heat behaviour | #511 | #2,165 | 14,005 | AIKO-G640-MCH72Dw leads by 1,654 places | | Weight | #5,829 | #7,363 | 14,005 | AIKO-G640-MCH72Dw leads by 1,534 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,271 | #1,704 | 14,005 | AIKO-G640-MCH72Dw leads by 433 places | ## Questions ### Which panel is better: AIKO AIKO-G640-MCH72Dw or DAH Solar DHN-78X16/DG-640W? According to our database: **AIKO AIKO-G640-MCH72Dw** has higher module efficiency (**23.70%** vs **22.90%**); **AIKO AIKO-G640-MCH72Dw** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AIKO AIKO-G640-MCH72Dw and DAH Solar DHN-78X16/DG-640W? **AIKO AIKO-G640-MCH72Dw** has a module efficiency of **23.70%**, while **DAH Solar DHN-78X16/DG-**640 W**** is **22.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AIKO AIKO-G640-MCH72Dw use vs DAH Solar DHN-78X16/DG-640W? **AIKO AIKO-G640-MCH72Dw** uses **Back Contact** cells; **DAH Solar DHN-78X16/DG-**640 W**** uses **TOPCon**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on AIKO AIKO-G640-MCH72Dw and DAH Solar DHN-78X16/DG-640W? **AIKO AIKO-G640-MCH72Dw** has a **30 years** power warranty; **DAH Solar DHN-78X16/DG-**640 W**** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are AIKO AIKO-G640-MCH72Dw and DAH Solar DHN-78X16/DG-640W bifacial panels? Both **AIKO AIKO-G640-MCH72Dw** and **DAH Solar DHN-78X16/DG-**640 W**** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [AIKO AIKO-G640-MCH72Dw vs AIKO AIKO-G660-MCH72Dw](https://comparepv.com/compare/aiko-aiko-g640-mch72dw/aiko-aiko-g660-mch72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-G640-MCH72Dw vs AIKO AIKO-G655-MCH72Dw](https://comparepv.com/compare/aiko-aiko-g640-mch72dw/aiko-aiko-g655-mch72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-G640-MCH72Dw vs AIKO AIKO-G650-MCH72Dw](https://comparepv.com/compare/aiko-aiko-g640-mch72dw/aiko-aiko-g650-mch72dw) - 3 differences, the largest is module efficiency - [AIKO AIKO-G640-MCH72Dw vs AIKO AIKO-G645-MCH72Dw](https://comparepv.com/compare/aiko-aiko-g640-mch72dw/aiko-aiko-g645-mch72dw) - One difference: module efficiency - [AIKO AIKO-G640-MCH72Dw vs AIKO AIKO-G635-MCH72Dw](https://comparepv.com/compare/aiko-aiko-g640-mch72dw/aiko-aiko-g635-mch72dw) - One difference: module efficiency - [DAH Solar DHN-78X16/DG-640W vs DAH Solar DHN-78X16/DG-635W](https://comparepv.com/compare/dah-dhn-78x16-dg-640w/dah-dhn-78x16-dg-635w) - The same specification on paper --- Source: https://comparepv.com/compare/aiko-aiko-g640-mch72dw/dah-dhn-78x16-dg-640w Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.